.golangci.yml

version: "2"

linters:
  # Default set of linters.
  # The value can be:
  # - `standard`: https://golangci-lint.run/docs/linters/#enabled-by-default
  # - `all`: enables all linters by default.
  # - `none`: disables all linters by default.
  # - `fast`: enables only linters considered as "fast" (`golangci-lint help linters --json | jq '[ .[] | select(.fast==true) ] | map(.name)'`).
  # Default: standard
  default: none

  # Enable specific linter.
  enable:
    - asasalint
    - asciicheck
    - bidichk
    - bodyclose
    - copyloopvar
    - depguard
    - dogsled
    - errcheck
    - errname
    - errorlint
    - gocheckcompilerdirectives
    - gocritic
    - goprintffuncname
    - gosec
    - govet
    - ineffassign
    - interfacebloat
    - lll
    - makezero
    - mirror
    - nakedret
    - nilerr
    - nolintlint
    - perfsprint
    - prealloc
    - predeclared
    - revive
    - sqlclosecheck
    - staticcheck
    - testifylint
    - tparallel
    - unconvert
    - unparam
    - unused
    - usetesting

  # All available settings of specific linters.
  settings:
    depguard:
      # Rules to apply.
      #
      # Variables:
      # - File Variables
      #   Use an exclamation mark `!` to negate a variable.
      #   Example: `!$test` matches any file that is not a go test file.
      #
      #   `$all` - matches all go files
      #   `$test` - matches all go test files
      #
      # - Package Variables
      #
      #   `$gostd` - matches all of go's standard library (Pulled from `GOROOT`)
      #
      # Default (applies if no custom rules are defined): Only allow $gostd in all files.
      rules:
        # Name of a rule.
        main:
          # List of file globs that will match this list of settings to compare against.
          # By default, if a path is relative, it is relative to the directory where the golangci-lint command is executed.
          # The placeholder '${base-path}' is substituted with a path relative to the mode defined with `run.relative-path-mode`.
          # The placeholder '${config-path}' is substituted with a path relative to the configuration file.
          # Default: $all
          files:
            - '!**/agent/**'
            - '!**/cmd/**'
            - '!**/config/**'
            - '!**/filter/**'
            - '!**/internal/**'
            - '!**/logger/**'
            - '!**/metric/**'
            - '!**/models/**'
            - '!**/plugins/serializers/**'
            - '!**/scripts/**'
            - '!**/selfstat/**'
            - '!**/testutil/**'
            - '!**/tools/**'
            - '!**/*_test.go'
          # List of packages that are not allowed.
          # Entries can be a variable (starting with $), a string prefix, or an exact match (if ending with $).
          # Default: []
          deny:
            - pkg: log
              desc: 'Use injected telegraf.Logger instead'

    errcheck:
      # report about assignment of errors to blank identifier: `num, _ := strconv.Atoi(numStr)`.
      # Such cases aren't reported by default.
      # Default: false
      check-blank: true

      # List of functions to exclude from checking, where each entry is a single function to exclude.
      # See https://github.com/kisielk/errcheck#excluding-functions for details.
      exclude-functions:
        - '(*hash/maphash.Hash).Write'
        - '(*hash/maphash.Hash).WriteByte'
        - '(*hash/maphash.Hash).WriteString'
        - '(*github.com/influxdata/telegraf/plugins/outputs/postgresql/sqltemplate.Template).UnmarshalText'

    gocritic:
      # Disable all checks.
      # Default: false
      disable-all: true
      # Which checks should be enabled in addition to default checks; can't be combined with 'disabled-checks'.
      # By default, list of stable checks is used (https://go-critic.com/overview#checks-overview).
      # To see which checks are enabled run `GL_DEBUG=gocritic golangci-lint run --enable=gocritic`.
      enabled-checks:
        # diagnostic
        - argOrder
        - badCall
        - badCond
        - badLock
        - badRegexp
        - badSorting
        - badSyncOnceFunc
        - builtinShadowDecl
        - caseOrder
        - codegenComment
        - commentedOutCode
        - deferInLoop
        - deprecatedComment
        - dupArg
        - dupBranchBody
        - dupCase
        - dupSubExpr
        - dynamicFmtString
        - emptyDecl
        - evalOrder
        - exitAfterDefer
        - externalErrorReassign
        - filepathJoin
        - flagName
        - mapKey
        - nilValReturn
        - offBy1
        - regexpPattern
        - sloppyLen
        - sloppyReassign
        - sloppyTypeAssert
        - sortSlice
        - sprintfQuotedString
        - sqlQuery
        - syncMapLoadAndDelete
        - truncateCmp
        - uncheckedInlineErr
        - unnecessaryDefer
        - weakCond
        # performance
        - appendCombine
        - equalFold
        - hugeParam
        - indexAlloc
        - preferDecodeRune
        - preferFprint
        - preferStringWriter
        - preferWriteByte
        - rangeExprCopy
        - rangeValCopy
        - sliceClear
        - stringXbytes

      # Settings passed to gocritic.
      # The settings key is the name of a supported gocritic checker.
      # The list of supported checkers can be found at https://go-critic.com/overview.
      settings:
        hugeParam:
          # Size in bytes that makes the warning trigger.
          # Default: 80
          sizeThreshold: 512
        rangeValCopy:
          # Size in bytes that makes the warning trigger.
          # Default: 128
          sizeThreshold: 512

    gosec:
      # To select a subset of rules to run.
      # Available rules: https://github.com/securego/gosec#available-rules
      # Default: [] - means include all rules
      includes:
        - G101 # Look for hard coded credentials
        - G102 # Bind to all interfaces
        - G103 # Audit the use of unsafe block
        - G106 # Audit the use of ssh.InsecureIgnoreHostKey
        - G107 # Url provided to HTTP request as taint input
        - G108 # Profiling endpoint automatically exposed on /debug/pprof
        - G109 # Potential Integer overflow made by strconv.Atoi result conversion to int16/32
        - G110 # Potential DoS vulnerability via decompression bomb
        - G111 # Potential directory traversal
        - G112 # Potential slowloris attack
        - G114 # Use of net/http serve function that has no support for setting timeouts
        - G201 # SQL query construction using format string
        - G202 # SQL query construction using string concatenation
        - G203 # Use of unescaped data in HTML templates
        - G301 # Poor file permissions used when creating a directory
        - G302 # Poor file permissions used with chmod
        - G303 # Creating tempfile using a predictable path
        - G305 # File traversal when extracting zip/tar archive
        - G306 # Poor file permissions used when writing to a new file
        - G401 # Detect the usage of MD5 or SHA1
        - G403 # Ensure minimum RSA key length of 2048 bits
        - G404 # Insecure random number source (rand)
        - G405 # Detect the usage of DES or RC4
        - G406 # Detect the usage of MD4 or RIPEMD160
        - G501 # Import blocklist: crypto/md5
        - G502 # Import blocklist: crypto/des
        - G503 # Import blocklist: crypto/rc4
        - G505 # Import blocklist: crypto/sha1
        - G506 # Import blocklist: golang.org/x/crypto/md4
        - G507 # Import blocklist: golang.org/x/crypto/ripemd160
        - G601 # Implicit memory aliasing of items from a range statement
        - G602 # Slice access out of bounds
      # G104, G105, G113, G204, G304, G307, G402, G504 were not enabled intentionally
      # TODO: review G115 when reporting false positives is fixed (https://github.com/securego/gosec/issues/1212)

      # To specify the configuration of rules.
      config:
        # Maximum allowed permissions mode for os.OpenFile and os.Chmod
        # Default: "0600"
        G302: "0640"
        # Maximum allowed permissions mode for os.WriteFile and ioutil.WriteFile
        # Default: "0600"
        G306: "0640"

    govet:
      # Settings per analyzer.
      settings:
        # Analyzer name, run `go tool vet help` to see all analyzers.
        printf:
          # Comma-separated list of print function names to check (in addition to default, see `go tool vet help printf`).
          # Default: []
          funcs:
            - (github.com/influxdata/telegraf.Logger).Tracef
            - (github.com/influxdata/telegraf.Logger).Debugf
            - (github.com/influxdata/telegraf.Logger).Infof
            - (github.com/influxdata/telegraf.Logger).Warnf
            - (github.com/influxdata/telegraf.Logger).Errorf
            - (github.com/influxdata/telegraf.Logger).Trace
            - (github.com/influxdata/telegraf.Logger).Debug
            - (github.com/influxdata/telegraf.Logger).Info
            - (github.com/influxdata/telegraf.Logger).Warn
            - (github.com/influxdata/telegraf.Logger).Error

    lll:
      # Max line length, lines longer will be reported.
      # '\t' is counted as 1 character by default, and can be changed with the tab-width option.
      # Default: 120.
      line-length: 160
      # Tab width in spaces.
      # Default: 1
      tab-width: 4

    nakedret:
      # Make an issue if func has more lines of code than this setting, and it has naked returns.
      # Default: 30
      max-func-lines: 1

    nolintlint:
      # Enable to require an explanation of nonzero length after each nolint directive.
      # Default: false
      require-explanation: true
      # Enable to require nolint directives to mention the specific linter being suppressed.
      # Default: false
      require-specific: true

    prealloc:
      # Report pre-allocation suggestions only on simple loops that have no returns/breaks/continues/gotos in them.
      # Default: true
      simple: false

    revive:
      # Sets the default severity.
      # See https://github.com/mgechev/revive#configuration
      # Default: warning
      severity: error

      # Run `GL_DEBUG=revive golangci-lint run --enable-only=revive` to see default, all available rules, and enabled rules.
      rules:
        - name: argument-limit
          arguments: [ 6 ]
        - name: atomic
        - name: bare-return
        - name: blank-imports
        - name: bool-literal-in-expr
        - name: call-to-gc
        - name: comment-spacings
        - name: confusing-naming
        - name: confusing-results
        - name: constant-logical-expr
        - name: context-as-argument
        - name: context-keys-type
        - name: datarace
        - name: deep-exit
        - name: defer
        - name: dot-imports
        - name: duplicated-imports
        - name: early-return
        - name: empty-block
        - name: empty-lines
        - name: enforce-map-style
          exclude: [ "TEST" ]
          arguments:
            - "make"
        - name: enforce-repeated-arg-type-style
          arguments:
            - "short"
        - name: enforce-slice-style
          arguments:
            - "make"
        - name: error-naming
        - name: error-return
        - name: error-strings
        - name: errorf
        - name: exported
          exclude:
            - "**/accumulator.go"
            - "**/agent/**"
            - "**/cmd/**"
            - "**/config/**"
            - "**/filter/**"
            - "**/internal/**"
            - "**/logger/**"
            - "**/logger.go"
            - "**/metric/**"
            - "**/metric.go"
            - "**/migrations/**"
            - "**/models/**"
            - "**/persister/**"
            - "**/metric.go"
            - "**/parser.go"
            - "**/plugin.go"
            - "**/plugins/common/**"
            - "**/plugins/outputs/**"
            - "**/plugins/parsers/**"
            - "**/selfstat/**"
            - "**/serializer.go"
            - "**/testutil/**"
            - "**/tools/**"
          arguments:
            - "check-private-receivers"
            - "say-repetitive-instead-of-stutters"
            - "check-public-interface"
            - "disable-checks-on-types"
        - name: function-result-limit
          arguments: [ 3 ]
        - name: get-return
        - name: identical-branches
        - name: if-return
        - name: import-alias-naming
          arguments:
            - "^[a-z][a-z0-9_]*[a-z0-9]+$"
        - name: import-shadowing
        - name: increment-decrement
        - name: indent-error-flow
        - name: max-public-structs
          arguments: [ 5 ]
          exclude: [ "TEST" ]
        - name: modifies-parameter
        - name: modifies-value-receiver
        - name: optimize-operands-order
        - name: package-comments
        - name: range
        - name: range-val-address
        - name: range-val-in-closure
        - name: receiver-naming
        - name: redefines-builtin-id
        - name: redundant-import-alias
        - name: string-format
          arguments:
            - - 'fmt.Errorf[0],errors.New[0]'
              - '/^([^A-Z]|$)/'
              - 'Error string must not start with a capital letter.'
            - - 'fmt.Errorf[0],errors.New[0]'
              - '/(^|[^\.!?])$/'
              - 'Error string must not end in punctuation.'
            - - 'panic'
              - '/^[^\n]*$/'
              - 'Must not contain line breaks.'
        - name: string-of-int
        - name: struct-tag
        - name: superfluous-else
        - name: time-equal
        - name: time-naming
        - name: unconditional-recursion
        - name: unexported-naming
        - name: unnecessary-stmt
        - name: unreachable-code
        - name: unused-parameter
        - name: unused-receiver
        - name: var-declaration
        - name: var-naming
          arguments:
            - [ ] # AllowList
            - [ "ID", "DB", "TS" ] # DenyList
        - name: waitgroup-by-value

    staticcheck:
      # SAxxxx checks in https://staticcheck.dev/docs/configuration/options/#checks
      # Example (to disable some checks): [ "all", "-SA1000", "-SA1001"]
      # Run `GL_DEBUG=staticcheck golangci-lint run --enable=staticcheck` to see all available checks and enabled by config checks.
      # Default: ["all", "-ST1000", "-ST1003", "-ST1016", "-ST1020", "-ST1021", "-ST1022"]
      checks:
        - all
        # Poorly chosen identifier.
        # https://staticcheck.dev/docs/checks/#ST1003
        - -ST1003
        # Apply De Morgan's law.
        # https://staticcheck.dev/docs/checks/#QF1001
        - -QF1001
        # Convert if/else-if chain to tagged switch.
        # https://staticcheck.dev/docs/checks/#QF1003
        - -QF1003
        # Use 'strings.ReplaceAll' instead of 'strings.Replace' with 'n == -1'.
        # https://staticcheck.dev/docs/checks/#QF1004
        - -QF1004
        # Lift 'if'+'break' into loop condition.
        # https://staticcheck.dev/docs/checks/#QF1006
        - -QF1006
        # Merge conditional assignment into variable declaration.
        # https://staticcheck.dev/docs/checks/#QF1007
        - -QF1007
        # Omit embedded fields from selector expression.
        # https://staticcheck.dev/docs/checks/#QF1008
        - -QF1008
        # Use 'time.Time.Equal' instead of '==' operator.
        # https://staticcheck.dev/docs/checks/#QF1009
        - -QF1009

    testifylint:
      # Disable all checkers (https://github.com/Antonboom/testifylint#checkers).
      # Default: false
      disable-all: true
      # Enable checkers by name
      enable:
        - blank-import
        - bool-compare
        - compares
        - contains
        - empty
        - encoded-compare
        - error-is-as
        - error-nil
        - expected-actual
        - float-compare
        - formatter
        - go-require
        - len
        - negative-positive
        - nil-compare
        - regexp
        - require-error
        - suite-broken-parallel
        - suite-dont-use-pkg
        - suite-extra-assert-call
        - suite-subtest-run
        - suite-thelper
        - useless-assert

    usetesting:
      # Enable/disable `os.TempDir()` detections.
      # Default: false
      os-temp-dir: true

  # Defines a set of rules to ignore issues.
  # It does not skip the analysis, and so does not ignore "typecheck" errors.
  exclusions:
    # Mode of the generated files analysis.
    #
    # - `strict`: sources are excluded by strictly following the Go generated file convention.
    #    Source files that have lines matching only the following regular expression will be excluded: `^// Code generated .* DO NOT EDIT\.$`
    #    This line must appear before the first non-comment, non-blank text in the file.
    #    https://go.dev/s/generatedcode
    # - `lax`: sources are excluded if they contain lines like `autogenerated file`, `code generated`, `do not edit`, etc.
    # - `disable`: disable the generated files exclusion.
    #
    # Default: strict
    generated: lax

    # Excluding configuration per-path, per-linter, per-text and per-source.
    rules:
      # errcheck
      - path: cmd/telegraf/(main|printer|cmd_plugins).go
        text: "Error return value of `outputBuffer.Write` is not checked"

      - path: plugins/inputs/win_perf_counters/pdh.go
        linters:
          - errcheck

      # gosec:G101
      - path: _test\.go
        text: "Potential hardcoded credentials"

      # gosec:G404
      - path: _test\.go
        text: "Use of weak random number generator"

      # revive:max-public-structs
      - path-except: ^plugins/(aggregators|inputs|outputs|parsers|processors|serializers)/...
        text: "max-public-structs: you have exceeded the maximum number"

      # revive:var-naming
      - path: (.+)\.go$
        text: don't use an underscore in package name

      # revive:var-naming
      - path: (.*)\.go$
        text: avoid meaningless package names

      # revive:var-naming: Exclude mixed-caps packages in migrations, as these migrations are fixing the issues from before.
      - path: migrations/.*\.go$
        text: don't use MixedCaps in package name

      # revive:var-naming: Exclude check for package names that conflict with standard library package names (e.g., "net", "json", "http", "os")
      - path: (.*)\.go$
        text: conflict with Go standard library package names

      # revive:exported
      - path: (.+)\.go$
        text: exported method .*\.(Init |SampleConfig |Gather |Start |Stop |GetState |SetState |SetParser |SetParserFunc |SetTranslator |Probe |Add |Push |Reset |Serialize |SerializeBatch |Get |Set |List |GetResolver |Apply |SetSerializer )should have comment or be unexported

      # EXC0001 errcheck: Almost all programs ignore errors on these functions, and in most cases it's ok
      - path: (.+)\.go$
        text: Error return value of .((os\.)?std(out|err)\..*|.*Close.*|.*close.*|.*Flush|.*Disconnect|.*disconnect|.*Clear|os\.Remove(All)?|.*print(f|ln)?|os\.Setenv|os\.Unsetenv). is not checked

      # EXC0013 revive: Annoying issue about not having a comment. The rare codebase has such comments
      - path: (.+)\.go$
        text: package comment should be of the form "(.+)...

      # EXC0015 revive: Annoying issue about not having a comment. The rare codebase has such comments
      - path: (.+)\.go$
        text: should have a package comment

    # Which file paths to exclude: they will be analyzed, but issues from them won't be reported.
    # "/" will be replaced by the current OS file path separator to properly work on Windows.
    # Default: []
    paths:
      - plugins/parsers/influx/machine.go*

formatters:
  # Enable specific formatter.
  # Default: [] (uses standard Go formatting)
  enable:
    - gci

  # Formatters settings.
  settings:
    gci:
      # Section configuration to compare against.
      # Section names are case-insensitive and may contain parameters in ().
      # The default order of sections is `standard > default > custom > blank > dot > alias > localmodule`.
      # If `custom-order` is `true`, it follows the order of `sections` option.
      # Default: ["standard", "default"]
      sections:
        - standard                       # Standard section: captures all standard packages.
        - default                        # Default section: contains all imports that could not be matched to another section type.
        - localmodule                    # Local module section: contains all local packages. This section is not present unless explicitly enabled.

  exclusions:
    # Mode of the generated files analysis.
    #
    # - `strict`: sources are excluded by strictly following the Go generated file convention.
    #    Source files that have lines matching only the following regular expression will be excluded: `^// Code generated .* DO NOT EDIT\.$`
    #    This line must appear before the first non-comment, non-blank text in the file.
    #    https://go.dev/s/generatedcode
    # - `lax`: sources are excluded if they contain lines like `autogenerated file`, `code generated`, `do not edit`, etc.
    # - `disable`: disable the generated files exclusion.
    #
    # Default: lax
    generated: lax

issues:
  # Maximum issues count per one linter.
  # Set to 0 to disable.
  # Default: 50
  max-issues-per-linter: 0

  # Maximum count of issues with the same text.
  # Set to 0 to disable.
  # Default: 3
  max-same-issues: 0

  # Make issues output unique by line.
  # Default: true
  uniq-by-line: false

# Output configuration options.
output:
  # The formats used to render issues.
  formats:
    # Prints issues in columns representation separated by tabulations.
    tab:
      # Output path can be either `stdout`, `stderr` or path to the file to write to.
      # Default: stdout
      path: stdout

  # Order to use when sorting results.
  # Possible values: `file`, `linter`, and `severity`.
  #
  # If the severity values are inside the following list, they are ordered in this order:
  #   1. error
  #   2. warning
  #   3. high
  #   4. medium
  #   5. low
  # Either they are sorted alphabetically.
  #
  # Default: ["linter", "file"]
  sort-order:
    - file # filepath, line, and column.
    - linter

  # Show statistics per linter.
  # Default: true
  show-stats: true

severity:
  # Set the default severity for issues.
  #
  # If severity rules are defined and the issues do not match or no severity is provided to the rule
  # this will be the default severity applied.
  # Severities should match the supported severity names of the selected out format.
  # - Code climate: https://docs.codeclimate.com/docs/issues#issue-severity
  # - Checkstyle: https://checkstyle.sourceforge.io/property_types.html#SeverityLevel
  # - GitHub: https://help.github.com/en/actions/reference/workflow-commands-for-github-actions#setting-an-error-message
  # - TeamCity: https://www.jetbrains.com/help/teamcity/service-messages.html#Inspection+Instance
  #
  # `@linter` can be used as severity value to keep the severity from linters (e.g. revive, gosec, ...)
  #
  # Default: ""
  default: error